| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C C | AA4CF | 524 | 28.63 % | | 637 | 28.53 % | | 2 | C C D C | AA3B | 520 | 28.42 % | | 670 | 30.00 % | | 3 | C C D C C C | BD1IIJ | 399 | 21.80 % | | 476 | 21.32 % | | 4 | C D C C | E7CW | 116 | 6.34 % | | 144 | 6.45 % | | 5 | C D C C C | F4CVQ | 91 | 4.97 % | | 98 | 4.39 % | | 6 | C D D C | E70T | 34 | 1.86 % | | 40 | 1.79 % | | 7 | C D D C C | A41CK | 30 | 1.64 % | | 38 | 1.70 % | | 8 | D C D C C | 3V8SS | 26 | 1.42 % | | 28 | 1.25 % | | 9 | C D C | C4W | 22 | 1.20 % | | 22 | 0.99 % | | 10 | D C D C | 3Z0X | 18 | 0.98 % | | 23 | 1.03 % | | 11 | C C D D C C C | DL50IFM | 8 | 0.44 % | | 9 | 0.40 % | | 12 | D C D C C C | 2E0CVN | 8 | 0.44 % | | 9 | 0.40 % | | 13 | C C D D C | EI20C | 6 | 0.33 % | | 6 | 0.27 % | | 14 | C C D C C C / C | DL4HCF/P | 3 | 0.16 % | | 3 | 0.13 % | | 15 | C C D D D C C | OL700CO | 3 | 0.16 % | | 3 | 0.13 % | | 16 | C C D D C C C C | PC75FREE | 2 | 0.11 % | | 3 | 0.13 % | | 17 | C C D C C C / C C C | HB9FBG/QRP | 2 | 0.11 % | | 2 | 0.09 % | | 18 | C C D C C C / D | IZ5TJD/7 | 2 | 0.11 % | | 2 | 0.09 % | | 19 | C C D C C / C | DF7BA/P | 1 | 0.05 % | | 1 | 0.04 % | | 20 | D C D D C C | 4K75FO | 1 | 0.05 % | | 1 | 0.04 % | | 21 | D C D D C | 4U25B | 1 | 0.05 % | | 1 | 0.04 % | | 22 | D C D C C C C C C C C | 4U9STAYHOME | 1 | 0.05 % | | 1 | 0.04 % | | 23 | D C D / C D C C | 5Z4/G3AB | 1 | 0.05 % | | 1 | 0.04 % | | 24 | D C D C C C / D | 8J1ITU/1 | 1 | 0.05 % | | 1 | 0.04 % | | 25 | C C D D C C | OG30YL | 1 | 0.05 % | | 1 | 0.04 % | | 26 | C C D C C C C C C C C | OH5STAYHOME | 1 | 0.05 % | | 1 | 0.04 % | | 27 | C C D C / C C C | IR9R/QRP | 1 | 0.05 % | | 1 | 0.04 % | | 28 | C C / C D C C | EW/R3XA | 1 | 0.05 % | | 1 | 0.04 % | | 29 | C C D / C D C C C | PJ4/K4BAI | 1 | 0.05 % | | 1 | 0.04 % | | 30 | C D D D D C | S5400J | 1 | 0.05 % | | 1 | 0.04 % | | 31 | C D D C C C | S57NAW | 1 | 0.05 % | | 1 | 0.04 % | | 32 | C C D C C / C C C | YU1LM/QRP | 1 | 0.05 % | | 5 | 0.22 % | | 33 | C C D / C C D C C C | ZP6/LU8EOT | 1 | 0.05 % | | 1 | 0.04 % | | 34 | C C D C / D | ZR2A/4 | 1 | 0.05 % | | 1 | 0.04 % | |
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